On the city's north end, the old 10-mile US highway 95 that climbs 2,000 vertical feet (610 m) of the Lewiston Hill (elev. 2,756 ft (840 m)) grade to the Palouse is mostly out of use, except for the truly adventurous traveler and couple of businesses and several residences built for the panoramic views. Called the "Old Spiral Highway", the very twisty road (64 curves) was opened in 1917 and was the primary route north for 60 years. It received an award as one of the best-engineered stretches of mountain highway at the time.
At the top it joins with U.S. 95−U.S. 195. The newer multi-lane grade of U.S. 95, constructed from 1975 to 1977, yields a straighter and steeper sweeping descent to the east, then back to the southwest, and is approximately 7 miles (11 km) in length. Both grades provide excellent views of the Lewiston-Clarkston area and beyond.